Mitsubishi FX3U-4AD User Manual page 339

FX /FX /FX PLC User's Manual - Analog Control Edition
3G 3U 3UC
FX -4AD-PT-ADP (4-channel Platinum Resistance Thermometer Data Input)
3U
5.4 Program Check
Check the following items for the program:
1. Cancellation of error status at power-on
When the power is turned off and then on again, the error status should be cleared (b6 and b7 should turn off)
using the program.
2. Check of storage devices
Verify that different values are not being stored in the same device by the other parts of the programs.
5.5 Error Status Check
If an error occurs in the PT-ADP, the corresponding bit will turn on.
Bit
The temperature measurement data of
b0 channel 1 is outside the specified
range, or disconnection is detected.
The temperature measurement data of
b1 channel 2 is outside the specified
range, or disconnection is detected.
The temperature measurement data of
b2 channel 3 is outside the specified
range, or disconnection is detected.
The temperature measurement data of
b3 channel 4 is outside the specified
range, or disconnection is detected.
b4 EEPROM error
To solve a problem, refer to the troubleshooting method described below:
1. Temperature measurement out of specified range or disconnection of line (b0 to b3)
1) Description of error
The input temperature measurement value is outside the specified range.
The temperature measurement value is not in the range between -55°C to 255°C.
Or the line between PT-ADP and the platinum resistance thermometer sensor is disconnected.
2) Remedy
Check that the input temperature measurement value is within the specified range. Also check the wiring
condition.
2. EEPROM error (b4)
1) Description of error
The adjustment data set in the EEPROM before delivery from our factory cannot be read out properly or
is destroyed.
2) Remedy
Please contact the nearest Mitsubishi Electric distributor office.
3. Averaging time setting error (b5)
1) Description of error
The averaging time set for one of the channels (channels 1 to 4) is outside the specified
range: 1 to 4095.
2) Remedy
Check that the averaging time is correctly set for each channel.
Description Bit Description
b5 Averaging time setting error
b6 PT-ADP hardware error
b7 PT-ADP communication data error
b8 to 15 Unused
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5 Troubleshooting
5.4 Program Check
A
B
C
D
E
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F
G
H
H-27
I
J